1999 Mode

1999 Mode is an unlockable game mode in BioShock Infinite. Activating it significantly increases the challenge of the game. According to Irrational Games creative director Ken Levine, "[Average gamers] are gonna hate this mode. That's okay - it's not for them." He also warns, "This mode is not going to feel like BioShock."

On PC:Open the XUserOptions.ini (...Documents\My Games\BioShock Infinite\XGame\Config) with an editor and change "DefaultbHasInput1999Code=0" in line 79 to "...=1" and "bHasInput1999Code=False" in line 117 to "=True".